A fully automatic concrete jetting reinforcement device

Abstract

The application provides a full-automatic concrete injection reinforcing device, and relates to the technical field of tunnel concrete injection, which comprises a main injection part, a feeding protection part is installed on the main injection part; the main injection part is used for full-automatic injection of concrete; a gun head part is installed on the main injection part; a sleeve connection prompting part is installed on the gun head part; the sleeve connection prompting part is used for prompting the injection recoil force; low-pressure switches are used to conveniently prompt workers that the actual concrete injection pressure is too small, which can easily cause poor adhesion; the structure can directly detect and prompt the recoil force of concrete injection, and is more direct and standard; and the problems that the current concrete injection reinforcing device is difficult to control the injection distance and is inconvenient for automatic injection pressure quality prompting are solved.

Description

Technical Field

[0001] This invention relates to the field of tunnel concrete spraying technology, and in particular to a fully automatic concrete spraying reinforcement device. Background Technology

[0002] In actual tunnel construction, shotcreting of tunnel walls is a common reinforcement method. Shotcreting involves using a fully automated shotcrete machine to automatically mix the raw materials and spray them directly onto the tunnel wall, forming a poured layer. Shotcrete immediately forms a support layer that adheres tightly to the surrounding rock, significantly improving support efficiency, especially in weak rock formations, when combined with steel arches and anchor bolts. However, current shotcrete reinforcement devices often rely on manual operation with hand-held spray guns. This not only results in significant recoil but also poses a safety hazard if the gun is accidentally released. Furthermore, shotcreting generates particulate pollution, affecting the operator's visibility and making it difficult to control the spraying distance. Excessive distance directly reduces the quality of concrete adhesion. Additionally, the device cannot automatically indicate whether the spraying pressure is sufficient, thus affecting the spraying effect. Moreover, traditional spraying methods are prone to causing rocks and other particles to fall into the hopper, causing blockages, and lack effective anti-blocking protection. Summary of the Invention

[0003] This disclosure relates to a fully automatic concrete spraying reinforcement device to solve the problems of current concrete spraying reinforcement devices having difficulty controlling the spraying distance and not being able to automatically provide spraying pressure quality prompts.

[0004] In a first aspect, this disclosure provides a fully automatic concrete spraying reinforcement device, specifically comprising a spraying main body, on which a feed protection component is installed; the spraying main body is used for fully automatic concrete spraying; a nozzle component is installed on the spraying main body; a connection indicator component is installed on the nozzle component; the connection indicator component is used to indicate the recoil force after spraying; an anti-detachment protection component is installed on the connection indicator component; a gas protection structure is installed on the connection indicator component; the spraying main body includes: a fully automatic spraying machine and a connecting pipe, the connecting pipe being fixedly installed on the fully automatic spraying machine; the fully automatic spraying machine is used for spraying concrete; the connecting pipe is used for the flow of concrete.

[0005] In at least some embodiments, the main spraying component further includes: a hopper, a rotating shaft, and a sealing switch; the hopper is fixedly mounted on the fully automatic spraying machine; the rotating shaft is fixedly mounted on the hopper; the sealing switch is fixedly mounted on the hopper, and the end of the sealing switch protrudes from the hopper; the hopper is provided with a threaded hole; the hopper is used to fill sprayed concrete raw materials.

[0006] In at least some embodiments, the feed protection component includes: a feed cover and an extrusion plate, wherein the top of the feed cover is conical; the feed cover is rotatably mounted on a rotating shaft; the bottom of the feed cover is attached to the top of the hopper; an extrusion plate is fixedly mounted at the end of the feed cover, and the bottom edge of the extrusion plate is beveled; the bottom of the extrusion plate presses against a sealing switch; the feed cover is used to cover the hopper; and the sealing switch is electrically connected to the spraying host of the fully automatic spraying machine.

[0007] In at least some embodiments, the feed protection component further includes: a connecting bolt, which is inserted into the extrusion plate; the end of the connecting bolt is threaded into a threaded hole on the hopper.

[0008] In at least some embodiments, the nozzle component includes: a spray coupling tube, a rear retaining ring, a front retaining post, and a spray pipe. The spray coupling tube is fixedly mounted on a connecting pipe. A rear retaining ring is fixedly mounted on one end of the spray coupling tube. A front retaining post is fixedly mounted on the other end of the spray coupling tube. The front retaining post has inclined surfaces on both sides. The outer side of the spray coupling tube has a hexagonal structure. The spray pipe is fixedly mounted on the front retaining post.

[0009] In at least some embodiments, the gun head component further includes: a support spring, wherein two support springs are sleeved on the injection coupling tube, and the two support springs are respectively fixedly installed on the rear retaining ring and the front retaining column.

[0010] In at least some embodiments, the socket indicator includes: a sleeve, a socket sleeve, and a low-pressure switch; the sleeve is slidably sleeved on the rear retaining ring and the front retaining column; the socket sleeve is fixedly sleeved on the inner side of the sleeve; the inner side of the socket sleeve has a hexagonal hole; the socket sleeve is sleeved on the injection coupling pipe; a low-pressure switch is fixedly installed on the sleeve; the low-pressure switch is located on the rear side of the front retaining column; the low-pressure switch is used to indicate the injection quality; and the socket sleeve is located between two support springs.

[0011] In at least some embodiments, the anti-detachment protective component includes: a handheld rod, a push-button switch, and an indicator light. The handheld rod is fixedly mounted on a sleeve. The handheld rod is provided with two rubber sleeves. Two push-button switches are fixedly mounted on the handheld rod, and the two push-button switches are electrically connected to the spray host of the fully automatic spraying machine. Two indicator lights are fixedly mounted on the handheld rod, and the two indicator lights are electrically connected to a low-voltage switch.

[0012] In at least some embodiments, the anti-detachment protective component further includes a ventilation switch, which is fixedly installed on the hand handle.

[0013] In at least some embodiments, the gas protection structure includes: a jet housing, an air inlet pipe, and a solenoid valve. The jet housing is fixedly mounted on a sleeve. An annular air outlet groove is provided on the outer side of the sleeve. An air inlet pipe is fixedly mounted on the side of the jet housing, and an air pump is connected to the air inlet pipe. A solenoid valve is installed on the air inlet pipe. The venting switch is electrically connected to the solenoid valve. The jet housing is used for jet protection.

[0014] This invention provides a fully automatic concrete spraying reinforcement device, which has the following beneficial effects:

[0015] The feed protection component used in this invention can easily shield and protect the hopper, preventing stones that splash off from the tunnel wall from falling into the hopper during actual concrete spraying and causing blockages during subsequent spraying. The use of a sealing switch ensures that the feed cover is closed before controlling the fully automatic spraying machine to operate normally, further ensuring that the feed cover is not forgotten to be closed and reducing the failure rate. The gas protection structure combined with the ventilation switch facilitates quick ventilation protection. When looking up at the top of the sprayed tunnel, the air pressure helps to form an air curtain, which can reduce dust and liquid droplet interference and make it easier for workers to observe from below.

[0016] Furthermore, the use of a gun head assembly with a connecting indicator, achieved through a flexible connection, reduces recoil impact and improves user comfort. The structure also utilizes a low-pressure switch to easily alert operators when the actual concrete spraying pressure is too low, potentially leading to poor adhesion. This structure directly uses the recoil of the sprayed concrete for detection and alerting, providing a more direct and standardized approach. Additionally, this structure is unaffected by dust during concrete spraying, eliminating the need for laser ranging and other methods. The more rational design prevents dust from obstructing the view of the sprayed concrete, thus avoiding excessive distance between the sprayed concrete and the tunnel wall and preventing wasted concrete. Finally, the structure incorporates two push-button switches for anti-drop protection, effectively preventing the continued spraying of concrete while the handle is out of reach, thus avoiding potential safety hazards. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments will be briefly described below.

[0018] The accompanying drawings described below are only related to some embodiments of the invention and are not intended to limit the invention.

[0019] In the attached diagram:

[0020] Figure 1 A schematic diagram of the overall structure of a fully automatic concrete spraying reinforcement device according to this application is shown;

[0021] Figure 2A schematic diagram of the bottom structure of a fully automatic concrete spraying reinforcement device according to this application is shown;

[0022] Figure 3 A schematic diagram of the overall structure of the injection body component of this application is shown;

[0023] Figure 4 This application shows Figure 3 Enlarged view of the structure of region B in the middle;

[0024] Figure 5 A schematic diagram of the overall structure of the feed protection component of this application is shown;

[0025] Figure 6 A schematic diagram of the overall structure of the anti-detachment protective component of this application is shown;

[0026] Figure 7 A schematic diagram of the overall structure of the gun head component of this application is shown;

[0027] Figure 8 A schematic diagram of the overall structure of the socket prompting device of this application is shown;

[0028] Figure 9 A schematic diagram of the installation location of the low-voltage switch of this application is shown;

[0029] Figure 10 This application shows Figure 2 Enlarged view of the structure of region H in the middle.

[0030] List of reference numerals

[0031] 1. Main spraying components; 101. Fully automatic spraying machine; 1011. Connecting pipe; 102. Hopper; 103. Rotating shaft; 104. Sealing switch; 2. Feed protection components; 201. Feed cover; 202. Extrusion plate; 203. Connecting bolt; 3. Gun head components; 301. Spraying connecting pipe; 302. Rear retaining ring; 303. Front retaining column; 304. Spraying pipe; 305. Support spring; 4. Connecting indicator components; 401. Sleeve; 4011. Connecting sleeve; 402. Low-pressure switch; 5. Anti-detachment protection components; 501. Hand handle; 502. Press switch; 503. Indicator light; 504. Vent switch; 6. Gas protection structure; 601. Air jet shell; 602. Air inlet pipe; 603. Solenoid valve. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the described embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] Example 1: Please refer to Figures 1 to 10 :

[0034] This invention proposes a fully automatic concrete spraying reinforcement device, comprising a spraying main body 1, on which a feed protection component 2 is installed; the spraying main body 1 is used for fully automatic concrete spraying; a nozzle component 3 is installed on the spraying main body 1; a connection indicator component 4 is installed on the nozzle component 3; the connection indicator component 4 is used to indicate the recoil force after spraying; an anti-detachment protection component 5 is installed on the connection indicator component 4; a gas protection structure 6 is installed on the connection indicator component 4; the spraying main body 1 includes: a fully automatic spraying machine 101 and a connecting pipe 1011, the connecting pipe 1011 is fixedly installed on the fully automatic spraying machine 101; the fully automatic spraying machine 101 is used for spraying concrete; the connecting pipe 1011 is used for the flow of concrete.

[0035] In this embodiment, the main spraying component 1 further includes: a hopper 102, a rotating shaft 103, and a sealing switch 104. The hopper 102 is fixedly mounted on the fully automatic spraying machine 101; the rotating shaft 103 is fixedly mounted on the hopper 102; the sealing switch 104 is fixedly mounted on the hopper 102, and the end of the sealing switch 104 protrudes from the hopper 102; the hopper 102 is provided with a threaded hole; the hopper 102 is used to fill sprayed concrete raw materials; the feed protection component 2 includes: a feed cover 201 and an extrusion plate 202. The top of the feed cover 201 is conical; the feed cover 201 is rotatably mounted on the rotating shaft 103; the bottom of the feed cover 201 is attached to the top of the hopper 102; an extrusion plate 202 is fixedly installed at the end of the feed cover 201, and the bottom edge of the extrusion plate 202 is a beveled structure; the bottom of the extrusion plate 202 presses against the sealing switch 104; the feed cover 201 is used to cover the hopper 102; the sealing switch 104 is electrically connected to the spraying host of the fully automatic spraying machine 101; the feed protection component 2 also includes: a connecting bolt 203, a connecting screw... Bolt 203 is inserted into extrusion plate 202; the end of connecting bolt 203 is threaded into threaded hole on hopper 102. The feed protection component 2 can easily cover and protect hopper 102, preventing stones splashed off from the tunnel wall from falling into hopper 102 during actual concrete spraying, which could cause blockage during subsequent spraying and effectively reduce the failure rate. At the same time, this structure uses a sealing switch 104 to ensure that the feed cover 201 is closed before controlling the fully automatic spraying machine 101 to operate normally. This can further ensure that the feed cover 201 is not forgotten to be closed, reducing the failure rate. When concrete spraying is needed, concrete raw materials are put into hopper 102. After all the raw materials are put in, the feed cover 201 can be rotated to close, covering hopper 102. At this time, extrusion plate 202 is also moved to the top of sealing switch 104. The inclined structure of the bottom edge of extrusion plate 202 can easily squeeze sealing switch 104 without jamming. At this time, the spraying host of fully automatic spraying machine 101 can be controlled and started normally.

[0036] In this embodiment, the nozzle component 3 includes: a spray coupling tube 301, a rear retaining ring 302, a front retaining post 303, and a spray pipe 304. The spray coupling tube 301 is fixedly installed on the connecting pipe 1011; the rear retaining ring 302 is fixedly installed at one end of the spray coupling tube 301; the front retaining post 303 is fixedly installed at the other end of the spray coupling tube 301; the front retaining post 303 has beveled structures on both sides; the outer side of the spray coupling tube 301 has a hexagonal structure; the spray pipe 304 is fixedly installed on the front retaining post 303; the nozzle component 3 also includes: support springs 305, two support springs 305 are sleeved on the spray coupling tube 301, and the two support springs 305 are respectively fixedly installed on the rear retaining ring 302 and the front retaining post 303; the sleeved indicator 4 includes The components include: a sleeve 401, a connecting sleeve 4011, and a low-pressure switch 402. The sleeve 401 is slidably fitted onto the rear retaining ring 302 and the front retaining column 303. The connecting sleeve 4011 is fixedly fitted onto the inner side of the sleeve 401. The inner side of the connecting sleeve 4011 has a hexagonal hole. The connecting sleeve 4011 is fitted onto the injection coupling pipe 301. The low-pressure switch 402 is fixedly installed on the sleeve 401. The low-pressure switch 402 is located behind the front retaining column 303. The low-pressure switch 402 is used to indicate the injection quality. The connecting sleeve 4011 is located between two support springs 305. The anti-detachment protection component 5 includes: a hand lever 501, a push switch 502, and an indicator light 503. The hand lever 501 is fixedly installed on the sleeve 401. The hand lever 501 has two rubber sleeves. Two push-button switches 502 are fixedly installed on the handheld lever 501, and the two push-button switches 502 are electrically connected to the spraying host of the fully automatic spraying machine 101. Two indicator lights 503 are fixedly installed on the handheld lever 501, and the two indicator lights 503 are electrically connected to the low-pressure switch 402. The gun head part 3 is used in conjunction with the sleeved indicator part 4. Through the elastic connection, the recoil impact can be reduced, and the user comfort can be improved. At the same time, this structure uses the low-pressure switch 402 to easily remind the operator that the actual concrete spraying pressure is too low, which can easily lead to poor adhesion. This structure can directly use the recoil of concrete spraying for detection and indication, which is more direct and standard. At the same time, this structure is not affected by the dust during concrete spraying. This design eliminates the need for laser ranging and other methods, resulting in a more rational structure. It prevents dust from obstructing the concrete spraying and causing excessive distance between the sprayed concrete and the tunnel wall, thus avoiding concrete waste. Furthermore, the structure utilizes two push-button switches 502 for anti-drop protection, effectively preventing the continued spraying of concrete while the handheld lever 501 is out of reach, thus avoiding safety hazards. The structure is simple to control. If the distance between the spraying pipe 304 and the tunnel is too great, or if the spraying pipe 304 is blocked, both a decrease in spraying pressure and an increase in spraying distance will reduce the reverse force. Under the elastic compression of the support spring 305, when the front stop column 303 moves forward and no longer presses the low-pressure switch 402, the two indicator lights 503 will turn off.

[0037] In Example 2, based on Example 1, the anti-detachment protective component 5 further includes: a ventilation switch 504, which is fixedly installed on the handheld rod 501; the gas protection structure 6 includes: a jet shell 601, an air inlet pipe 602, and a solenoid valve 603. The jet shell 601 is fixedly installed on the sleeve 401; an annular air outlet groove is provided on the outer side of the sleeve 401; an air inlet pipe 602 is fixedly installed on the side of the jet shell 601, and an air pump is connected to the air inlet pipe 602; a solenoid valve 603 is installed on the air inlet pipe 602; the ventilation switch 504 is electrically connected to the solenoid valve 603; the jet shell 601 is used for jet protection. The use of the gas protection structure 6 in conjunction with the ventilation switch 504 facilitates rapid ventilation protection work, especially for jet reinforcement work in tunnels. When looking up at the top of the jet tunnel, it can assist in forming an air curtain wall through air pressure, which can reduce dust and liquid droplet interference, facilitate workers' upward observation, make the structure more reasonable, and reduce the pollution of workers' skin and clothing by falling concrete. The structure is simple to control.

[0038] The working principle of this embodiment is as follows: First, when concrete spraying is required, concrete raw materials are put into the hopper 102. After all the raw materials are put in, the feed cover 201 can be rotated to close, covering the hopper 102. At this time, the extrusion plate 202 will move synchronously with the feed cover to the top of the closing switch 104. The inclined structure of its bottom edge can prevent jamming during extrusion, ensuring that the closing switch 104 is successfully triggered. Only at this time can the spraying host of the fully automatic spraying machine 101 be normally started by controlling the two push switches 502. At the same time, in order to prevent the feed cover 201 from shaking, the connecting bolt 203 can be manually threaded onto the hopper 102 for positioning. Even if there is any subsequent leakage... Falling stones are blocked by the feed cover 201, and the sloping top of the feed cover 201 facilitates the sliding of stones. A manual hand holds the handle 501 and simultaneously presses the switch 502 to start the automatic shotcrete machine 101. Concrete material is then sprayed from the spray pipe 304. Once the manual hand releases the handle 501, the switch 502 is no longer pressed, stopping the automatic shotcrete machine 101. During concrete spraying, the resistance from the tunnel interior increases the reaction force. At this time, the manual hand holds the handle 501, and the spraying connection pipe 301 and the front stop column 3... 03 Under the reverse force, when moving backward, it will compress the support spring 305 near the front stop 303. The other support spring 305 mainly serves as an elastic support for the sleeve 4011. At the same time, when the distance between the spraying pipe 304 and the tunnel is small, the reverse force from the sprayed concrete is large, pushing the front stop 303 backward and compressing the support spring 305. By using the inclined edge of the front stop 303 to squeeze the low-pressure switch 402, the two indicator lights 503 can be controlled to light up to indicate normal operation. However, once the distance between the spraying pipe 304 and the tunnel is large or the spraying pipe 304 is blocked, whether the spraying pressure decreases or the spraying distance increases, the spraying will be affected. Adding pressure will reduce the reverse force. When the front stop 303 moves forward and no longer presses the low-pressure switch 402 under the elastic compression of the support spring 305, the two indicator lights 503 will turn off, and manual adjustment is required in time. When it is necessary to shoot concrete from an upward angle, the ventilation switch 504 can be pressed manually to open the solenoid valve 603. The high-pressure gas in the air pump connected to the air inlet pipe 602 can be discharged from the jet shell 601. The annular air outlet groove on the jet shell 601 can make the gas spray out evenly. If there is fallen dust or liquid droplets, the high-pressure gas sprayed from the outside of the jet shell 601 can blow them away, reducing interference to the workers.

[0039] The following points should be noted in this article:

[0040] 1. The accompanying drawings of the embodiments disclosed herein only relate to the structures involved in the embodiments disclosed herein; other structures can be referred to in general design.

[0041] 2. Where there is no conflict, the embodiments of this disclosure and the features in the embodiments can be combined with each other to obtain new embodiments.

[0042] The above are merely specific embodiments of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. A fully automatic concrete jet grouting device, comprising a jet body piece (1), a feeding protection piece (2) is installed on the jet body piece (1); characterized in that: The main spraying component (1) is used for fully automatic spraying of concrete; a nozzle component (3) is installed on the main spraying component (1); a connection indicator component (4) is installed on the nozzle component (3); the connection indicator component (4) is used to indicate the recoil force after spraying; The sleeve reminder (4) is equipped with an anti-detachment protective component (5); A gas protection structure (6) is installed on the socket indicator (4). The main spraying component (1) includes: a fully automatic spraying machine (101) and a connecting pipe (1011), wherein the connecting pipe (1011) is fixedly installed on the fully automatic spraying machine (101). The main spraying component (1) further includes: a hopper (102), a rotating shaft (103), and a shut-off switch (104). The hopper (102) is fixedly installed on the fully automatic spraying machine (101). The rotating shaft (103) is fixedly installed on the hopper (102). The shut-off switch (104) is fixedly installed on the hopper (102), and the end of the shut-off switch (104) protrudes from the hopper (102). The feed protection component (2) includes: a feed cover (201) and an extrusion plate (202). The top of the feed cover (201) is conical. The feed cover (201) is rotatably mounted on a rotating shaft (103). The bottom of the feed cover (201) is attached to the top of the hopper (102). An extrusion plate (202) is fixedly mounted at the end of the feed cover (201), and the bottom edge of the extrusion plate (202) is a beveled structure. The bottom of the extrusion plate (202) is pressed against a sealing switch (104). The feed cover (201) is used to cover the hopper (102). The sealing switch (104) is electrically connected to the spray host of the fully automatic spraying machine (101). The gun head component (3) includes: a spray connector (301), a rear retaining ring (302), a front retaining post (303), and a spray pipe (304). The spray connector (301) is fixedly installed on the connecting pipe (1011). The rear retaining ring (302) is fixedly installed at one end of the spray connector (301). The front retaining post (303) is fixedly installed at the other end of the spray connector (301). The front retaining post (303) has inclined surfaces on both sides. The outer side of the spray connector (301) has a hexagonal structure. The spray pipe (304) is fixedly installed on the front retaining post (303). The gun head component (3) further includes: a support spring (305), two support springs (305) are sleeved on the injection coupling pipe (301), and the two support springs (305) are respectively fixedly installed on the rear retaining ring (302) and the front retaining column (303); The connecting indicator (4) includes: a sleeve (401), a connecting sleeve (4011), and a low-pressure switch (402). The sleeve (401) is slidably connected to the rear retaining ring (302) and the front retaining column (303). The connecting sleeve (4011) is fixedly connected to the inner side of the sleeve (401). The connecting sleeve (4011) has a hexagonal hole on its inner side. The connecting sleeve (4011) is connected to the injection coupling pipe (301). The low-pressure switch (402) is fixedly installed on the sleeve (401). The low-pressure switch (402) is located behind the front retaining column (303). The connecting sleeve (4011) is located between two support springs (305). The anti-detachment protection component (5) includes: a vent switch (504). The gas protection structure (6) includes: a jet shell (601), an air inlet pipe (602), and a solenoid valve (603). The jet shell (601) is fixedly installed on the sleeve (401). An annular air outlet groove is provided on the outside of the sleeve (401). An air inlet pipe (602) is fixedly installed on the side of the jet shell (601), and an air pump is connected to the air inlet pipe (602). A solenoid valve (603) is installed on the air inlet pipe (602). The ventilation switch (504) is electrically connected to the solenoid valve (603).

2. The fully automatic concrete spraying reinforcement device according to claim 1, characterized in that, The hopper (102) is provided with a threaded hole; the hopper (102) is used to fill sprayed concrete raw materials.

3. The fully automatic concrete spraying reinforcement device according to claim 1, characterized in that, The feed protection component (2) further includes: a connecting bolt (203), which is inserted into the extrusion plate (202); the end of the connecting bolt (203) is threaded into the threaded hole on the hopper (102).

4. The fully automatic concrete spraying reinforcement device according to claim 1, characterized in that, The anti-detachment protective component (5) further includes: a hand handle (501), a push switch (502), and an indicator light (503). The hand handle (501) is fixedly installed on the sleeve (401). The hand handle (501) is provided with two rubber sleeves. The hand handle (501) is fixedly installed with two push switches (502), and the two push switches (502) are electrically connected to the spray host of the fully automatic spray machine (101). The hand handle (501) is fixedly installed with two indicator lights (503), and the two indicator lights (503) are electrically connected to the low-voltage switch (402).

5. The fully automatic concrete spraying reinforcement device according to claim 4, characterized in that, A ventilation switch (504) is fixedly installed on the hand lever (501).

Images